Examples of com.tinkerpop.gremlin.structure.Edge

com.tinkerpop.gremlin.structure.Edge
driguez.com) @author Stephen Mallette (http://stephen.genoprime.com)

    @Test
    public void serializeEdge() throws Exception {
        final Graph g = TinkerGraph.open();
        final Vertex v1 = g.addVertex();
        final Vertex v2 = g.addVertex();
        final Edge e = v1.addEdge("test", v2);
        e.property("abc", 123);


        final Iterable<Edge> iterable = g.E().toList();


        final ResponseMessage response = convert(iterable);
        assertCommon(response);

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    @Test
    public void serializeEdge() throws Exception {
        final Graph g = TinkerGraph.open();
        final Vertex v1 = g.addVertex();
        final Vertex v2 = g.addVertex();
        final Edge e = v1.addEdge("test", v2);
        e.property("abc", 123);


        final Iterable<Edge> iterable = g.E().toList();


        final ResponseMessage response = convert(iterable);
        assertCommon(response);


        final List<Map<String, Object>> edgeList = (List<Map<String, Object>>) response.getResult().getData();
        assertEquals(1, edgeList.size());


        final Map<String, Object> deserializedEdge = edgeList.get(0);
        assertEquals(e.id(), deserializedEdge.get(GraphSONTokens.ID));
        assertEquals(v1.id(), deserializedEdge.get(GraphSONTokens.OUT));
        assertEquals(v2.id(), deserializedEdge.get(GraphSONTokens.IN));
        assertEquals(v1.label(), deserializedEdge.get(GraphSONTokens.OUT_LABEL));
        assertEquals(v2.label(), deserializedEdge.get(GraphSONTokens.IN_LABEL));
        assertEquals(e.label(), deserializedEdge.get(GraphSONTokens.LABEL));
        assertEquals(GraphSONTokens.EDGE, deserializedEdge.get(GraphSONTokens.TYPE));


        final Map<String, Object> properties = (Map<String, Object>) deserializedEdge.get(GraphSONTokens.PROPERTIES);
        assertNotNull(properties);
        assertEquals(123, properties.get("abc"));

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        printTraversalForm(traversal);
        int counter = 0;
        Set<Edge> edges = new HashSet<>();
        while (traversal.hasNext()) {
            counter++;
            Edge edge = traversal.next();
            edges.add(edge);
            assertTrue(edge.label().equals("knows") || edge.label().equals("created"));
        }
        assertEquals(3, counter);
        assertEquals(3, edges.size());
    }

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        printTraversalForm(traversal);
        int counter = 0;
        Set<Edge> edges = new HashSet<>();
        while (traversal.hasNext()) {
            counter++;
            Edge edge = traversal.next();
            edges.add(edge);
            assertTrue(edge.label().equals("created"));
            assertEquals(edge.outV().id().next(), convertToVertexId("josh"));
        }
        assertEquals(2, counter);
        assertEquals(2, edges.size());
    }

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        printTraversalForm(traversal);
        int counter = 0;
        Set<Edge> edges = new HashSet<>();
        while (traversal.hasNext()) {
            counter++;
            Edge edge = traversal.next();
            edges.add(edge);
            assertTrue(edge.label().equals("knows") || edge.label().equals("created"));
        }
        assertEquals(3, counter);
        assertEquals(3, edges.size());
    }

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    @Test
    @LoadGraphWith(MODERN)
    public void g_v4_bothEX1_createdX_localLimitX1X() {
        final Traversal<Vertex, Edge> traversal = get_g_v4_bothEX1_createdX_localLimitX1X(convertToVertexId("josh"));
        printTraversalForm(traversal);
        final Edge edge = traversal.next();
        assertEquals("created", edge.label());
        assertTrue(edge.value("weight").equals(1.0d) || edge.value("weight").equals(0.4d));
        assertFalse(traversal.hasNext());
    }

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        final TinkerGraph g = TinkerGraph.open();
        g.createIndex("oid", Edge.class);


        final Vertex v = g.addVertex();
        v.addEdge("friend", v, "oid", "1", "weight", 0.5f);
        final Edge e = v.addEdge("friend", v, "oid", "1", "weight", 0.5f);
        v.addEdge("friend", v, "oid", "2", "weight", 0.6f);


        // a tricky way to evaluate if indices are actually being used is to pass a fake BiPredicate to has()
        // to get into the Pipeline and evaluate what's going through it.  in this case, we know that at index
        // is used because only oid 1 should pass through the pipeline due to the inclusion of the
        // key index lookup on "oid".  If there's an weight of something other than 0.5f in the pipeline being
        // evaluated then something is wrong.
        assertEquals(2, StreamFactory.stream(g.E().has("weight", (t, u) -> {
            assertEquals(0.5f, t);
            return true;
        }, 0.5).has("oid", "1")).count());


        e.remove();
        assertEquals(1, StreamFactory.stream(g.E().has("weight", (t, u) -> {
            assertEquals(0.5f, t);
            return true;
        }, 0.5).has("oid", "1")).count());
    }

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            else
                throw new RuntimeException("damn");
        }).iterate();


        g.E().sideEffect(oe -> {
            final Edge e = oe.get();
            final Vertex v2 = ng.v(Integer.parseInt(e.inV().next().id().toString()));
            final Vertex v1 = ng.v(Integer.parseInt(e.outV().next().id().toString()));


            if (e.label().equals("followedBy"))
                v1.addEdge("followedBy", v2, T.id, Integer.parseInt(e.id().toString()), "weight", e.value("weight"));
            else if (e.label().equals("sungBy"))
                v1.addEdge("sungBy", v2, T.id, Integer.parseInt(e.id().toString()));
            else if (e.label().equals("writtenBy"))
                v1.addEdge("writtenBy", v2, T.id, Integer.parseInt(e.id().toString()));
            else
                throw new RuntimeException("bah");


        }).iterate();

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        @FeatureRequirementSet(FeatureRequirementSet.Package.SIMPLE)
        @FeatureRequirement(featureClass = Graph.Features.EdgeFeatures.class, feature = Graph.Features.EdgeFeatures.FEATURE_USER_SUPPLIED_IDS)
        public void shouldInjectAnIdAndReturnBySpecifiedId() {
            final IdGraphStrategy strategy = (IdGraphStrategy) ((StrategyWrappedGraph) g).getStrategy().getGraphStrategy().get();
            final Vertex v = g.addVertex(T.id, "test", "something", "else");
            final Edge e = v.addEdge("self", v, T.id, "edge-id", "try", "this");
            tryCommit(g, c -> {
                assertNotNull(e);
                assertEquals("edge-id", e.id());
                assertFalse(e.property(strategy.getIdKey()).isPresent());
                assertEquals("this", e.property("try").value());


                final Edge found = g.e("edge-id");
                assertEquals("edge-id", found.id());
                assertFalse(found.property(strategy.getIdKey()).isPresent());
                assertEquals("this", found.property("try").value());
            });
        }

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    @Test
    @FeatureRequirementSet(FeatureRequirementSet.Package.SIMPLE)
    public void shouldNotConstructNewWithSomethingAlreadyDetached() {
        final Vertex v = g.addVertex();
        final Edge e = v.addEdge("test", v);
        final DetachedEdge de = DetachedEdge.detach(e);
        assertSame(de, DetachedEdge.detach(de));
    }

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